Free CAM Cap Calculator
Model cumulative vs non-cumulative caps with carry-forward tracking. Download free.
CAM caps limit the annual increase in operating expenses a landlord can pass through to tenants. Whether a cap is cumulative or non-cumulative dramatically changes the landlord's recovery over a multi-year lease. This calculator models both structures so you can see the financial impact before negotiating lease terms.
What's inside
- Models both cumulative and non-cumulative caps side by side
- Shows carry-forward bank balance year over year
- Compares cap impact over a 5-year lease term
- Visualizes unused cap capacity and landlord exposure
Built for property controllers and asset managers who need to model cap structures during lease negotiations or reconciliation prep.
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Frequently Asked Questions
What is the difference between cumulative and non-cumulative CAM caps?
A non-cumulative cap limits the year-over-year increase to a fixed percentage (e.g., 5%) of the prior year's actual expenses. A cumulative cap limits the increase to a fixed percentage of the base year, compounded annually. The key difference: cumulative caps bank unused increases from low-expense years, allowing larger jumps later. Non-cumulative caps reset every year with no carry-forward.
How does carry-forward work with cumulative caps?
When actual expenses in a given year come in below the cumulative cap ceiling, the difference between the ceiling and actual expenses is 'banked.' In future years when expenses spike, the landlord can recover above the simple annual percentage because the cumulative ceiling has been growing each year regardless of actual spend. This carry-forward bank can represent tens of thousands of dollars over a 5-year lease term.
How do CAM caps interact with controllable expense clauses?
Many leases apply caps only to controllable expenses — costs the landlord can influence like janitorial, landscaping, and repairs. Non-controllable expenses (property taxes, insurance, utilities) are typically excluded from cap calculations and passed through at actual cost. When modeling caps, separate controllable from non-controllable expenses first, then apply the cap only to the controllable pool.
Which cap structure is better for landlords?
Cumulative caps generally favor landlords because unused cap capacity carries forward. In years with low expense growth, the bank builds up, giving the landlord room to recover higher costs in future years without hitting the cap. Non-cumulative caps are simpler but can create situations where legitimate cost increases exceed the allowed year-over-year limit with no recourse.
How do I calculate the cap ceiling for year 3 of a cumulative cap?
For a cumulative cap, multiply the base year expenses by (1 + cap%)^n where n is the number of years since the base year. For example, with a $100,000 base year and a 5% cumulative cap, the year 3 ceiling is $100,000 x 1.05^3 = $115,763. The tenant pays the lesser of actual expenses or this ceiling.